Indonesian Journal of Fundamental and Applied Chemistry
Published by Universitas Sriwijaya
ISSN : 25409395     EISSN : 25409409
Indonesian Journal of Fundamental and Applied Chemistry (IJFAC) is an international research journal and invites contributions of original research articles as well as review articles in several areas of chemistry. The journal aims to publish refereed, high-quality research papers with significant novelty and short communications in all branches of chemistry. Papers which describe novel theory and its application to practice are welcome, as are those which illustrate the transfer of techniques from other disciplines. IJFAC calls for papers that cover the following fields: Biochemistry Inorganic chemistry Physical chemistry Organic chemistry Analytical chemistry Applied Chemistry All papers are peer reviewed by at least two referees. Papers presented at conferences are peer reviewed and selected with the same standards as individually submitted papers. They therefore have the same archival value. Article should be submitted by the Online Submission Module at www.ijfac.unsri.ac.id or email to ijfac@unsri.ac.id
Articles 5 Documents
Search results for , issue " Vol 1, No 1 (2016): February 2016" : 5 Documents clear
Optimization Of Palm Oil Mill Effluent Treatment By Applying RSM And ANN Said, Muhammad; Ba-Abbad, Muneer M; Mohammad, Abdul Wahab
Indonesian Journal of Fundamental and Applied Chemistry Vol 1, No 1 (2016): February 2016
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Original Source | Check in Google Scholar | Full PDF (572.298 KB) | DOI: 10.24845/ijfac.v1.i1.07

Abstract

AbstractThe optimization of the COD removal from palm oil mill effluent (POME) has done. The correlation of concentration and pH of POME, and Trans membrane pressure (TMP) of Reverse Osmosis (RO) membrane was optimized by response surface method using a second order polynomial model with Box Behken design consist of 17 runs. To determine whether the model was adequate for representing the experimental data; it was indicated by the ANNOVA table (p-value, lack of fit and R2 values).  The main factor influenced the COD removal was concentration and pH of POME.  The optimum conditions were determined from 3D response surface and 2D contour graphs i.e. 28.30% of POME concentration at pH 10.75 and TMP 0.69 kPa to yield 24.1372 mg/L of COD value. The results demonstrate that the response surface method effective to minimize the number of experiment. Keywords: POME; RO membrane; RSM; ANN; COD
Thermal Stability and Acidity of Silica Supported Keggin Type Polyoxometalate K4[-SiW12O40]•nH2O Me, Welinda; Mohadi, Risfidian; Lesbani, Aldes
Indonesian Journal of Fundamental and Applied Chemistry Vol 1, No 1 (2016): February 2016
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Original Source | Check in Google Scholar | Full PDF (327.02 KB) | DOI: 10.24845/ijfac.v1.i1.24

Abstract

Silica supported polyoxometalate K4[a-SiW12O40]·nH2O was prepared systematically using tetraethyl ortho silicate by sol gel method to form K4[a-SiW12O40]·nH2O/Si. Compound K4[a-SiW12O40]·nH2O/Si was characterized by diffraction, spectroscopic, and acidity  analyses follow by thermal activity test at higher temperature up to 600 oC. Analysis of FTIR spectrum showed all unique vibration of polyoxometalate K4[a-SiW12O40]·nH2O was appeared at wavenumber 800-1000 cm-1 before and after supporting process. Crystallinity of K4[a-SiW12O40]·nH2O and K4[a-SiW12O40]·nH2O/Si were also similar without changing Keggin structure. Compound K4[a-SiW12O40]·nH2O/Si showed higher acidity than K4[a-SiW12O40]·nH2O probably due to Lewis acidity species. Keggin structure of K4[a-SiW12O40]·nH2O/Si was still retained up to 600 oC showing thermal stability of K4[a-SiW12O40]·nH2O/Si at high temperature.Keyword : Keggin polyoxometalate, tetraethyl ortho silicate, thermal stability, acidity
The influence of time reaction to characteristic of methyl ester sulfonate from seed oil ketapang Hariani, Poedji Loekitowati; Riyanti, Fahma; Fadilah, Ahyati
Indonesian Journal of Fundamental and Applied Chemistry Vol 1, No 1 (2016): February 2016
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Original Source | Check in Google Scholar | Full PDF (346.594 KB) | DOI: 10.24845/ijfac.v1.i1.14

Abstract

The aim of the present work was to The Preparation of Methyl Ester Sulfonate From Ketapang Seed Oil As Surfactant. The research is to determine the optimum condition synthesis of methyl ester sulfonate surfactant with reaction time variations (3.5; 4.0; 4.5; 5.0; 5.5 hours). The methyl ester from ketapang seed oil were analysis by GC-MS and identified methyl ester sulfonate by using FTIR spectroscopy. The methyl ester from ketapang seed oil showed containing of methyl palmitoleic, methyl linoleic, methyl palmitate, methyl stearate, methyl oleic, methyl palmitolenat and methyl eicosenoate. The optimum condition of methyl ester sulfonate at reaction time 4.5 hours with the mass of methyl ester sulfonate 34,85 g. For the FTIR spectra of sulfonate group is indicated  by shifting of wave number at 1118.71cm-1 until 1029.1 cm-1. The characteristics of methyl ester sulfonate at the optimum reaction time have emulsion stability 71.684%, density 0.8714 g/mL, surface tension 36.232 dyne/cm, and maximum absorbance 1.428 at the maximum wavelength 660 nm. Keywords: Surfactant, methyl ester sulfonate, time reaction, ketapang seed oil
Isolation of Triterpenoid from Katemas (Euphorbia geniculata Ortega) Stem Extracted using Methanol and Its Toxicity Test Eliza, Eliza; Fatsiami, Ricce; Yusuf, Setiawati; Ferlinahayati, Ferlinahayati
Indonesian Journal of Fundamental and Applied Chemistry Vol 1, No 1 (2016): February 2016
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Original Source | Check in Google Scholar | Full PDF (285.968 KB) | DOI: 10.24845/ijfac.v1.i1.19

Abstract

Katemas (Euphorbia geniculata Ortega) known as (Mexican) Fireplants, Painted Euphorbia, Japanese poinsettia is a plant belong to Euphorbiaceae or spurge family. Traditionally, this plant is used as furgative and treat dysentry. The aims of the research were to evaluate the toxicity and to isolate one of the triterpenoid extracted using methanol from the stem of this plant. The toxicity was evaluated by mortality test against armyworm larvae (Spodoptera litura). This assay was obtained by Methanol extraction at various concentrations (0, 1, 2, 3, 4 and 5%). The isolation process was conducted by series of work steps such as extraction, fractionation and purification. Structure elucidation was determined by spectroscopy techniques. Toxicity assay exhibited highest mortality at 5 % concentration with LC50 3,92%. Spectroscopy data analysis was able to identified a type of pentacyclic triterpenoid compound namely lupeol acetate.Keyword: Euphorbia geniculata Ortega, toxicity, lupeol acetate
Photodegradation of Permethrin using Photocatalyst Montmorillonite-TiO2 Rachmat, Addy; Said, Muhammad; Fatma, Fatma; Badarwi, Hardi Aji; Ramadhan, A.M.
Indonesian Journal of Fundamental and Applied Chemistry Vol 1, No 1 (2016): February 2016
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Original Source | Check in Google Scholar | Full PDF (578.563 KB) | DOI: 10.24845/ijfac.v1.i1.01

Abstract

            Photocatalyst Montmorillonite-TiO2 was synthesized using template CTAB and natural clay for degradation of Permethrin. The porosity and crystalline phase of catalyst were evaluated using N2 sorption analyzer and XRD diffraction. Permethrin photodegradation was optimized by varying reactant volume, irradiation time and initial concentration. Montmorillonite enhanced by CTAB showed typical porosity i.e. specific surface area, pore radii and pore volume for layer material. It properties decreased as this host material was impregnated with TiO2. XRD diagram indicated that space between layers of Montmorillonite expanded up to 4.7 Å. The diffractogram also confirmed that TiO2 formed an Anatase phase instead of Rutile. Photodegradation conducted at several condition showed relatively low photocatalytic activity. The highest photodegradation was achieved at 50 mL of Permethrin with initial concentration 10 ppm and 100 minutes’ irradiation. Keywords: Permethrin, Photodegradation, Montmorillonite-TiO2

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